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These three lights with their respective colors just do positively mean these things.
三种颜色的灯和它们各自的颜色,自然的有各自表达的意思。
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There can be some dangers, especially at nighttime. Central Park, there's no lights.
可能会有些危险，特别是在夜间。中央公园晚上没有灯，就更加危险。
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I of course picked the wrong day to wear a sweatshirt under really hot lights so thankfully I came prepared with another item from the-- from the store.
当然，我在主光灯下穿了件运动衫，这确实不太明智,幸好我过来时,从商店准备了另一件。
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I wish it didn't say "exit," but it does say "exit," because that kind of weakens my point, but over many auditorium doors a red light just hangs there.
如果这些灯上没有注明出口就好了“,因为这样会削弱我要证明的观点，礼堂的门上一般会挂着一盏红灯。
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So, ideally what we did see was, in fact, it does have enough energy with the UV lamp, it wasn't a dramatic shift you saw because we didn't start very high and then it went to that stuck point.
所以，理想上我们所看到的，事实上，紫外灯没有足够的能力，因为我们没有从非常高开始,所以它没有一个特别显著的移动,然后它又回到了黏着点。
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They are supposed to take that light out, but maybe by the end of the semester a miracle will occur. So why don't you look over here.
他们应该把灯关掉，但是可能直到期末这个奇迹,才会发生，所以，你们看这边吧。
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You can replace the headlights and still be the same hunk of stuff.
你可以换车头灯,但车还是那辆车。
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It is so shocking the lights go out.
灯怎么突然灭了
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Imagine I have a little lamp, a little goose- one of those little gooseneck lamps, I'd put it on the table here, I'd put the height about a f-- about a foot off the table. And if I was really good, - I could hit, or time it so that when I hurt- yeah, try again. When I turn this on switch on in the lamp, at exactly the same time, I'm going to hit a key on my computer and start it running.
想象下我有一个那种小雁颈台灯-,我把它放在桌子上，大概离桌子，有一英尺那么高吧,这样挺好的，我可以打开-,或者关闭这灯,并在这同时，我可以让我电脑,开始运行。
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You turn on your lamp, it happens pretty fast because current can flow very quickly through wire or through a charged - a solution of ions.
你打开灯 灯马上就亮了,电流可以迅速通过,电线或者带电荷的--电解质的溶液
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Certainly if you buy them out somewhere you're going to get one that's maybe the size of a light bulb, but it's like the flood light in your backyard or something, it's a huge light.
当然,你在外购买时,倒是有可能买到灯泡大小的,不过是你家后院强光灯大小的灯泡,巨大的灯泡
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U It's u, because u is to q plus w right, heat and work, but it's adiabatic. So there's no heat, exchange with the environment, and it's constant volume, so there's no p dV work, right.
什么是零？是U，因为,等于q加w，热量和功，但这是绝热的，所以系统与环境间没有热量交换；,同时它是灯体的，所以也没有pdV形式的功。
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And lightning strikes again and the lights go out.
突然一道闪电打下来，灯全都灭了。
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And of course it exists in a semiotic relationship to a white light over a street door which means "this is my house; if you wish you can ring the bell but I'd just as soon you stayed out."
当然它是存在于一个语义篇中的,而临街门上的白灯则意味着,这是我的房子，你要进来必须按门铃,但是你最好别进来“
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It's no use talking about the negative relationship between a red light and a green light and a yellow, white, or blue one because they all have the same value.
讲什么它是红灯，不是绿灯,不是黄灯白灯一点关系都没有,它们所代表的意义都一样。
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So if we think about the work function for zinc, and the work function for zinc is 6.9 times 10 to the -19 joules, do we expect that when we shine our UV light on the zinc, we'll be able to eject electrons?
如果我们考虑锌的功函数,它是6，9乘以10的-19次方焦耳，我们是否可以预测当,用紫外灯照射锌时，我们可以射出电子呢？
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We'll turn the light back on for a second here.
我们马上要开灯。
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Now in a stoplight, it only has three, one is tempted to say, variables plainly differing from each other: red, yellow and green we have two ways of thinking about the red light.
交通灯，三种灯，红黄绿，它们的颜色和彼此不能,我们有两种方式认识红灯的意思。
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When you go down the highway and you look up and see those sodium vapor lamps, the sodium vapor exists as the dimer Na2.
你在下高速公路时,会看到一些钠蒸汽灯，蒸汽灯中钠就有以Na2存在的。
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and of course we've already been gazing at that light back there, and it's not a good example.
如果我们看着那里的灯，虽然这个例子有些瑕疵。
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We have a UV lamp right here, which is centered at a wavelength of 254 nanometers.
我们有一个紫外灯在这里，波长集中在254纳米处。
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If only you'd known you had another 50 years, that you weren't going to die young-- or James Dean, going to burn out fast and die young-- if only you'd realized you were going to live to the ripe old age of 97, you would have picked a different life for yourself.
如果你知道自己还剩下50年，你不会英年早逝-,或者说你不会油尽灯枯，英年早逝-,如果你知道,你可以活到97岁高龄，你就会为自己选择另一种生活。
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Obviously, it doesn't mean "come in" in the sense of the red light over a street door.
当然，它不像临街灯一样表示,进来吧。
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This light is probably on to keep burglars away and so: "stop," right?
这个灯很可能是为了防止夜贼入侵的？
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Now our first thought is, Oh, aha, that has no meaning, right?
我们的第一反应就是，这灯没什么含义？
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So, if you use a black lamp or something and you excite something up to a higher energy level and then it relaxes back down to its lower energy state, it's going to emit a new wavelength of light, which is going to be visible to you.
如果你用一个紫外灯或别的,东西把某种分子激发到,更高的能级，然后它会掉回,到低能级，它就会释放,一个新的波长的光,这个光是可见的。
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